import type { MissingContext } from '@aws-cdk/cloud-assembly-schema';
/**
 * Temporarily overwrite the `process.env` with a new `env`
 *
 * We make the environment immutable in case there are accidental
 * concurrent accesses.
 */
export declare function temporarilyWriteEnv(env: Record<string, string>): {
    [Symbol.dispose](): void;
};
/**
 * Return all keys of missing context items
 */
export declare function missingContextKeys(missing?: MissingContext[]): Set<string>;
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